I have no pictures to contribute, but I did check the Whitman Double Eagle book to see if it had any mention of this. It does mention the different hubs in a short couple of paragraphs:
"...The obverse rays are shorter than they would be on the Type 6 [with motto] coins. Around the ends of the hair details there are incuse lines, to increase the relief. Certain details of the stars and leaves are somewhat blurry, due to the reducing of the relief on the model.
In 1908, during the coinage of the No Motto...coins, the hub was modified. The rays were lengthened and certain features were sharpened, including the stars and leaves. There are no incuse areas around the hair details now, the letters in LIBERTY are thinner and have larger serifs, and the second star to the right of the Y is slightly doubled." (A Guidebook of Double Eagle Gold Coins, Whitman Publishing)
This is the kind of thing that a casual type collector would probably never realize. Thanks for adding to my knowledge.